import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/login.vue'
import Home from './components/Home.vue'

Vue.use(Router)

const router = new Router({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    { path: '/home', component: Home }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to将要访问的页面
  // from代表从哪个路径跳转而来
  // next是一个函数，next（）代表放行 next（/地址）代表强制跳转

  if (to.path === '/login') return next()
  // 要先获取token来判断
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
